Montale is one of three peaks which overlook the city of San Marino, the capital of the Republic of San Marino. The other two are De La Fratta and Guaita. The tower on the peak was constructed in the 14th century. Unlike the other two towers constructed on the mount, Montale is not open to the public. It is one of the three towers depicted on both the national flag and coat of arms of San Marino. It is thought to have been constructed to give protection against the increasing power of the Malatesta family in that region. It was also used as a prison, and accordingly, the only entrance to the tower is a door about seven metres from ground level, which was common for prison architecture of the time.
References:The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.